Pipe-coupling.



H. 1). 0, HARRISON. PIPEJGOUPLLNG.

APPLIOATION FILED MAY 25, 1908.

906,225. I Patentd Dec. 8,1908,

2 SHEETS-SHEET 1.

- witness H. D. O. HARRISON.

Patented Dec. 8, 1908.

s-snnm a.

STATES PATENT- OFFICE.

PIPE-COUPLING.

specification ot Letters Patent.

Patented Dec. 8, 190a Application filed May 25, 1908. Serial No. 484,934.

To all whom it may concern: Be it known that I, HARRY D. C. HARRI- soN, a citizen of the United States, residing at Kingsville, in .the county of Clarion, State of Pennsylvania, have invented certain new and useful Improvements .in Pipe- Couplings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apper tains to make and use the same.

This invention relates to the joints or couplings whereby pipe sections are united, and has for one of its objects to improve and simplify devices of this character and increase the efiiciency and utility.

Another object of the invention is to provide a device of this character wherein the packing efliciency of the element is increased and the tendency to leakage around the outer portion thereof, prevented.

With these and other objects in view the invention consists in means whereby a packing element is caused to be expanded outwardly into a coupling collar simultaneously with its compression between the confrontingends of the pipe sections, to prevent leakage around the outer packing element.

With these and other objects in view the invention consists in certain novel. feas tures of construction as hereafter shown and described and then specifically pointed out in the claims, and in the drawings illustrating the preferred embodiment of the in vention, Figure 1 is a side elevation of the improved coupling. Fig. 2.is a longitudinal sectional view. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig; 4 is a longitudinal sectional view of the collar detached.

Great difliculty is experienced in prevent ingleakage at the joints in lines of piping, especially of piping employed for. conveying portion of the gas, oil and the like, and the improved coupbetween the confronting ends of the pipe sections and expanding it into a coupling collar, whereby a double acting packing element is provided, one packing action be-.

tween the-confronting ends of the pipe sections, and anotherv packing action between the collar and the packing element, so that if any leakage occurs between the packing and the pipe sections, it will be checkedby the expansion of the packing in the coupling element.

' In the improved device the confrontmg ends of the pipe sections 10-11 are beveled outwardly as shown.at 1213'and the sections externally threadedto receive an mt ernally threaded collar 14, the latter having an annular enlargement 15,-and an annular channel or groove 16 opposite the enlarge.- ment, the sides of the channel converglng toward the outside. The channel thus forms a seat for an annular packing element 17 of rubber or like compressible material.

The packing element is formed wlth the sides converging from the center toward the portion corresponding to and engaging between the beveled confronting ends of the pipe sections, and the outer convergmg portion conforming to and engaging 1n the converging channel 16. By this means when the pipe sections are rotated w1th1n the collar and moved toward each other by the action of the screw threads, the beveled ends of the-pipe sections compress the packing element between them-and likewise expand it outwardly, into the channel 16 and the converging walls of the channel cause the packing element to be also expanded 1ntherefore any leakage occurs between the ends of the pipe sections and the packing element, it will be effectually checked by thetwo fold expanded and central portion of the packing element.

The improved device will be found especially advantageous for employment in connection with pipe lines for, transporting oil, natural gas, and the like for long distances,

outer and inner edges, the'inner converging wardly toward its larger central portion. If.

as the pressure in such lines is very high an internal annular groove formed with the sides converging toward the outside, and an annular packing memberwith the sides converging from the center toward the outer and inner edges and engaging in said groove and between the beveled ends of the pipe sectlons.

2. A packing for pipe couplings formed of an annular body of yieldable material with the sides converging from the center toward the inner and outer edges, a collar ,havin an annular channel centrally thereof an with the sides diverging toward the interior of the collar, said collar internally.

threaded between the channel and the ends and engagin over the confronting ends of two external y threaded pipe sections with the co'nvergingouter portion of thepacking element engaging the channel and the inner convergin portion of the element engaging between t e confronting ends of the pipe sections.

In testimony whereof, I aifix my signa-' ture, in presence of two witnesses.

HARRY D. G. HARRISON.- Witnesses:

ALVIN J. Crrmmr, DANIEL E. CYPHERT. 

